The Borborema Province in NE Brazil is part of a large Neoproterozoic orogenic system related to the assembly West Gondwana. Its evolution contentious, due superposition events that overprinted former records. We present compilation geological, isotopic (U-Pb detrital zircon and whole-rock Sm-Nd), geophysical data support terrane accretion model for Transversal subprovince (central Province). B...

The Ksar Metlili Formation, from the Jurassic – Cretaceous transition (Tithonian Berriasian) of eastern High Atlas Mountains, Morocco, has yielded one richest microvertebrate assemblages Mesozoic Gondwana. With at least 19 species, mammaliaforms are particularly diverse. ‘Dryolestoidea’ most abundant and diverse; nevertheless, only Donodon perscriptoris Sigogneau-Russell, 1991a, monotypic Donod...

Neoproterozoic and Palaeozoic rocks of the Mérida Massif (SW Iberia) have been grouped into tectonostratigraphic units. Each unit is separated from rest ones by either crustal-scale thrusts and/or extensional detachments. The lowermost (Magdalena Gneisses; lower plate) has continental crust affinity, below a mafic-ultramafic ensemble, referred to as Ophiolite (suture zone). Serie Negra Group co...

El Devónico de! Dominio Astur-Leones de la Zona Cantábrica (ZC) carece facies adecuadas para grupos fósiles útiles en correlaciones a larga distancia. Por ello, datación y correlación se han ido cubriendo mediante el uso intervalos fau­nísticos, similares los definidos por Johnson Nevada, basados braquiópodos. De 29 identificados ZC, 6 primeros son extensibles al Palentino, mientras que otros e...

Abstract Olenellid trilobites from the lower Cambrian of Iberian Peninsula are very scarce and poorly studied, making them difficult to compare with defined species include in biostratigraphic paleobiogeographic analyses. Based on newly collected specimens, we revise ‘ Callavia ? lotzei ’ Richter Richter, 1941 ‘Cumbres beds’ Cumbres de San Bartolomé ‘Herrerías shale’ Cañaveral León, Sierra del ...

The Li-bearing pegmatites of the Pampean Pegmatite Province (PPP) occur in a rare-element pegmatite belt developed mainly Lower Paleozoic age on southwestern margin Gondwana. show Li, Rb, Nb ≤ Ta, Be, P, B, Bi enrichment, and belong to Li-Cs-Ta (LCT) petrogenetic family, Rare-Element-Li (REL-Li) subclass; most them are complex type spodumene subtype, some albite-spodumene type, few petalite sub...